US Patent: 1,676,210
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| Pipe Wrench
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Patentee:
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| Paul Armstrong (exact or similar names) - Chicago, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Nov. 29, 1926 |
| Granted: |
Jul. 03, 1928 |
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Patent Pictures:
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Paul Armstrong patent July 3, 1928 |
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Stan Schulz
Armstrong Brothers Tool Co. history
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Description: |
| Modification to the pipe wrench in patent no. 1,495,751 with a coil spring and plunger replacing the leaf spring to tip the movable jaw, and a smooth bearing area on the adjusting nut for the plunger.
Compare John H. Dowd patent no. 1,662,002.
Robert Burns - patent attorney
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